4-4 - Congruence SSS and SAS 4-4 4-4Triangle Triangle...

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Holt Geometry 4-4 Triangle Congruence: SSS and SAS 4-4 Triangle Congruence: SSS and SAS Holt Geometry Warm Up Warm Up Lesson Presentation Lesson Presentation Lesson Quiz Lesson Quiz
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS Warm Up 1. Name the angle formed by AB and AC . 2. Name the three sides of ABC . 3. QRS LMN . Name all pairs of congruent corresponding parts. Possible answer:  A QR LM , RS MN , QS LN , Q L , R M , S N AB , AC , BC
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS Apply SSS and SAS to construct triangles and solve problems. Prove triangles congruent by using SSS and SAS. Objectives
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS triangle rigidity included angle Vocabulary
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS In Lesson 4-3, you proved triangles congruent by showing that all six pairs of corresponding parts were congruent. The property of triangle rigidity gives you a shortcut for proving two triangles congruent. It states that if the side lengths of a triangle are given, the triangle can have only one shape.
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS For example, you only need to know that two triangles have three pairs of congruent corresponding sides. This can be expressed as the following postulate.
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Holt Geometry 4-4 Triangle Congruence: SSS and SAS Adjacent triangles share a side, so you can apply the Reflexive Property to get a pair of congruent parts.
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